乙基胺分离系统各塔的设计和模拟计算  

Design and simulation of a separation system for a mixture of ethylamines

作　　者：李群生[1] 陈文[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2010年第1期23-27,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家"863"计划(2006BAI09B07-01);国家"973"计划(2007CB714304)

摘　　要：根据各物料挥发度的不同以及三乙胺与乙醇、水的三元共沸物在不同压力下共沸组成的不同,对乙基胺粗产品进行了分离。乙基胺分离系统包括6个塔,精馏后得到纯的一乙胺、二乙胺、三乙胺产品。利用模拟软件Asp-en Plus对乙基胺分离系统进行了设计和模拟计算,得到了各塔理论板数和回流比等设计参数。精馏后产品的质量纯度满足一乙胺不低于0.995,二乙胺不低于0.995,三乙胺不低于0.998的要求。通过对分离系统中各塔冷凝器和再沸器热负荷的计算,得到了年产30000t乙基胺分离系统所需要提供的冷却水量约为1669t/h,需要提供的中压饱和蒸汽约为25.7 t/h,需要提供的低压饱和蒸汽约为15.1 t/h。Triethylamine, ethanol and water form a triple azeotropic system whose composition changes according to the pressure because the volatility of each component in the system is not the same. Because of this, a mixture of ethylamines can be separated by distillation. Pure ethylamine, diethylamine and triethylamine were separated using six distillation towers. We designed and simulated the ethylamine separation system using Aspen Plus. The optimal parameters such as theoretical plate number and reflux ratio were obtained. The mass purity of ethylamine, diethylamine and triethylamine were at least 0. 995, 0. 995 and 0. 998 respectively, which meets the commercial requirements. The amounts of steam and cooling water required were estimated by calculation of the thermal load. A separation system with a scale of 30000 t/a ethylamines needs about 1669 t/h of cooling water, 25.7 t/h mid-pressure steam and 15.1 t/h low-pressure steam.

关 键 词：乙胺 ASPEN Plus 模拟计算 理论板数 回流比 

分 类 号：TQ028.4[化学工程]